Shoe sewing machine



Sept. 7, 1937. B. 'r. LEVEQUE SHOE SEWING MACHINE Original Filed March 12, 1955 2 Sheets-Sheet 1 2 Sheets-Sheet 2 Original Filed March 12, 1935 attorneys Patented Sept. 7, 1937 PATENT FmE 2,091,997 snoE SEWING; MACHINE Bernard Leveque, Wenham, .Massl, assignor to a United Shoe Machinery, Corporation, Paterson,

N. J., a corporation of New Jersey Original application March 12,1935, Seri'alNo. 10,621. Divided and this'application May 12 1936, Serial No. 79,282

@The present invention-relates to shoe sewing machines and'more particularly 'to curved hook needle lockstitch sewing machines adapted'to sew the outsole to the welt and upper of a welted shoe.

i "The object of the invention isto provide a :needleand awl mechanism of improved constructionparticularly adapted for supporting and ac-- :tuating .the curved awl' and'curved hook needle is ofshoe sewing machinesof the class referred to.

"With thislobject in view, the/present invention ;zconsists' in'the construction, 'conibinatiomand arrangementcof parts hereinafter described and claimed, the advantages of which will be" obvious totliosezskilled in the art from the following description; a l The present application is a division of applizcan'tfsxpending application Serial No. 10,621, filed March 212, 1935, which fully illustrates and describes'a lockstit'ch outso'le shoe sewing machine employing acurved awl-and a curved hook-needle. In'the drawingsaccompanyingthe present application-only somuch of this machine is illustrated -as" is necessary=to-enable the construction and mode of operation -of the needle and' 'a wl mechanism to "be understood;-

Referring to the drawings, Figure 1 is a detail View in side elevation of the head of a shoe sewing machine embodying the invention, showing the needle and awl mechanism and certain of the other stitch-forming devices; Figure 2 is a detail sectional view of the supporting structure for the needle, awl, and needle guide, taken along the line 2 2 of Figure 3; Figure 3 is a detail sectional View taken along the line 33 of Figure 2, illustrating the needle segment and needle guide; Figure 4.15 a detail sectional view of the awl segment, taken along the line 4-4 of Figure 2; and

Figure 5 is a detail sectional View taken along the line 55 of Figure 2..

The work feeding mechanism is of that type in which the work is fed. intermittently by the cooperating action of a work-support and presser foot constructed and arranged to engage respectively the Welt and outsole of a shoe. Referring to Figure 1, thework support is indicated at 2, and the presscr foot at 4, both members being mounted on a feed carriage 6, which is mounted on fixed guides 8 and it for advancing and retracting movements to feed the work past the stitch-forming devices, of which the curved awl and the curved hook needle are indicated respectively at l2 and It.

In addition to the needle, the thread handling devices comprise a needle threading looper It, a

' ranged on the threadarmJB for drawing out a bight of thread betweenthe looper and the work, a loop taker 20 in the form of a rotary shuttle for passing" -a loop ';of needle thread over the locking thread *case'; a-lo'op spreader 22 to spread theloo'p-ior the-"loo'p taker, a take-up, a thread lock and'a -nee'dle thread pull-off or thread 'measurer; "The construction and operationofl these'device'sfis fully explained in cO-pending application Serial -No."10,621 to whichreference' has been made.

The cur'ved awl l2 and the curved hook needle 14 are clamped respectively "in the awl segment 24 'a'nd the-needle segment26, which'segments are mounted to "oscillate concentrically upon a fixed -stud 2 8.--'The-needle 'and awl segments are so supported that the needle and awl are in the same vertical -plane'and operate -in this plane without any movement back and forth'in the direction of reed; Theneedle guide indicated at 30 is secured to a hub iiz and this' hub'is also supported from the stud 28. Y

As afford-ingand one which pfermit's'a relative adjustmentof the needle and awlsegmnts -to'bring the needle andawl into'the same plane upon a change in the size ofeithfrthe' needle or the awl, or when for any reason these parts become displaced with relation to each other, the needle and awl segments and the hub of the needle guide are arstud 28 as follows. The hub of the needle guide and the awl segment are mounted in line with each other directly on the stud and.

the needle segment is mounted on the hub of simple and compactconstruction the needle guide between a flange on the hub of.

the needle guide and a plate 34 mounted on the stud 28 between a shoulder on the stud and the adjacent end of the hub of the needle guide, the plate being held from rotation by a pin 36 projecting from the plate into the arm 38 of the fixed bracket in which the stud issecured. Between the hub of the needle guide and the awl segment 24 a plate 40 is interposed and, is pressed yieldingly against the adjacent end face of the hub of the needle guide by coiled springs 42 seated in recesses in the awl segment, The

awl segment is mounted on the stud 28 between I the plate 40 and a fixed bracket arm 44. The

springs 42 thus tend to force the'hub of the needle awl segment bearing against the bracket arm 44 and with the hub of the needle guide and the needle segment bearing against the fixed plate 34. One end of the stud 28 is securely clamped in the bracket arm 38 by means of a binding bolt 46 and the other end of the stud extends through a supporting perforation in the bracket arm 44. At its end adjacent the bracket arm 44 the stud 28 is provided with an internal screw thread engaged by an adjusting screw 48, the flanged head of which engagesthe outer surface of the bracket arm 44. This screw provides a means for moving the stud 28 longitudinally when released by the clamping bolt 46 to adjust the awl and needle segments relatively to each other longitudinally of the stud to thereby bring the needle and awl into the same vertical plane.

The needle and awl segments are actuated, as hereinafter described, to cause the needle and awl to enter and Withdraw from the work. To. 7 actuate the needle guide in the desired manner so as to support the needle properly during its work piercing and loop drawing movements, the.

plate 4!] which bears against the end surface of the hub of the needle guide is connected to the awl segment by means of pins 50 rigid with i the plate and projecting into recesses in the hub of the awl segment. The movements of the awl segment thus tend to move the needle guide through the frictional engagement of the; plate Ail-with the hub of the guide and the'guide is ferred to. The link for actuating the awl is pivotally connected at ,its forward end to the down- Wardly extending arm of a bell crank 52 pivotally mounted in a fixed portion of the machine-frame on thesupporting shaft 54,. The forward end of the horizontal arm of the bell crank 52 is pro vided with a gear segment: 56 meshing with teeth formed on the awl-carrying segment 24.

To actuate the needle, the forward end'of the link of the needle-actuating train of mechanism is pivotally connected to the downwardly extending arm of the bell crank 58 pivotally mounted- -1. A shoe sewing machine having, in combination with the other stitch forming and work feeding devices, a curved hook needle and a curved awl arranged to operate in the same plane and to enter the work from opposite sides, a needle guide, a supporting pivot stud, a needle guide carrier mounted on the stud, a needle carrier journalled on the hub of the needle guide carrier, an awl carrier mounted on the stud, a friction plate driven by the awl carrier, and yieldingly pressed againstv the needle guide carrier, and means for adjusting the supporting stud with the needle guide and needle carrier with relation to the awl carrier longitudinally of the stud.

2. A shoe, sewing machine having, in combination with the other stitch forming and work feeding devices, a curved hook needle and a curved awl arranged to operate in the same plane and to enter the work from opposite sides, a needle guide, carriers for the needle, awl,-and needle guide, and a frictional connection between the carriers for the needle guide and awl for actuating the needle guide.

3. A shoe sewing machine having, in combination with the other stitch forming and work feeding devices, a curved hook needle and a curved awl arranged to operate in the same plane and to enter the work from opposite sides, a supporting pivot stud, needle and awl carriers mounted on the stud, yielding means holding said carriers separated longitudinally of the stud, and means for adjusting the stud together with one of said carriers with relation to the other carrier longitudinally of the stud.

BERNARD T. LEVEQUE. 

